The Karting World Championship is a kart racing competition organised by the CIK-FIA. It is held annually since 1964, and is karting's flagship event. The FIA (International Automobile Federation) created the CIK (International Karting Commission) in 1962. The Current President of the Championship is former Formula 1 driver Felipe Massa.

The first two World Championships in 1964 and 1965 were held over one final round, there after the world's best kart drivers competed for the title over an extended weekend, from Thursday to Saturday, including free and qualifying practice sessions, qualification heats, a pre-final and a final were common. From 2011 the championship has been disputed over five rounds, each of them in a different country. From 2014 the world championships returned to a single event with one venue each year organizing the CIK-FIA OK and OK Junior World Championships in one weekend and another venue in a different weekend holding the CIK-FIA KZ World Championships together with the CIK-FIA KZ2 Super Cup and the third and final round of the CIK-FIA Karting Academy Trophy. There is a separate CIK-FIA Endurance Championship, normally held each year at Le Mans, France, and there are separate Continental Championships like the CIK-FIA European Championships (OK, OK junior, KZ, KZ2 and Superkart) and the CIK-FIA Asia Pacific Championships. In 1968 CIK-FIA launched the first World Cup for Juniors.